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overall thickness of coal seam 煤层总厚度
The hardness and thickness of coal seam play a great role in the vertical distribution of stress in coal and the occurrence of rock bunt under the condition of hard roof and hard floor. 在“两硬”条件下，煤层厚度与硬度的变化对煤体中的应力分布有着很大的影响，从而对煤岩体系统中冲击矿压的发生有着很大的影响。
This paper analyzes on the influence of the variation in thickness of coal seam and the supporting method on the coal quality,and based on this,advances some measures for reducing the gangue production to improve the coal quality on the tunneling faces. 分析了煤层厚度变化和支护方式对煤质的影响,在此基础上提出了若干减少出矸以提高掘进工作面出煤质量的措施。
the ratio of excavating thickness to caving thickness of coal seam 采放比
Discussion on causes for diversities of thickness of coal seam No. Three3 in Cheji field 车集井田三3煤层厚度变化原因探讨
overall thickness of coal bed 煤层总厚度
Keywords thickness of coal seam;change;trend surface analgsis;orientational gradient;variation coefficient; 煤层厚度;变化;趋势面分析;方向梯度;变异系数;
The main coal seam of Taiping colliery is 11~# coal seam with a thickness of 1.5 m. 太平煤矿主采11%23煤层;煤厚1.;5 m
From Hales method, reversed refracted wave method shows accuracy and efficiency in detecting the thickness of remained coal seam. 以哈尔斯法为例,将相遇折射波法用于剩余煤厚探测中,具有精确、高效、快速的特点。
The case will be aluminum, which is more expensive than plastic but is sturdier and lets us shave a little more off the overall thickness of the device. 外壳将采用铝制材料，所以比塑料的昂贵但更为结实，让我们能够压缩更多一些的厚度。
thickness of coal seam 煤层厚度
7.The hardness and thickness of coal seam play a great role in the vertical distribution of stress in coal and the occurrence of rock bunt under the condition of hard roof and hard floor. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
Based on the lithology, thickness of aquifuge and changes of the rock between Ordovician limestone aquiferous to lower-group coal seam, the watertightness of aquifuge are evaluated. 对矿区内奥灰含水层与下组煤之间隔水层的岩性、厚度及变化进行了分析，并对隔水层的隔水性能做出了综合评价；
The rock mass structure can be expressed by rock stratum effect thickness influence coefficient. It is more scientific then using roof rock and sand content in the study of coal seam gas preservation. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
Many modelling results have showed that the resistivity curves reflect obviously the variation of coal thickness,which are enabled to measure the coal seam with the thickness mors than 0 8m. 结果表明，电阻率曲线对煤厚变化反映明显，能探测厚度大于0．8m的煤层。
The beam has a thickness of 3 inches. 这根梁厚3英寸。
The fact shows that the single leg type shield support and the technology of discharging coal in the side is an efficient method of coal mining under the condition of steep thick coal seam. 通过井下生产实践表明：单腿支撑柔性掩护支架采煤法和侧向放煤技术相结合是开采大倾角厚煤层一个新的、有效的采煤方法。
Research on coal bedding structure is the theory foundation and precondition of coal seam gas exploitation. 煤体层理结构的研究是煤层气开发开采的理论基础和前提条件。
A single thickness of a split hide. 皮厚一层被剥下的皮的厚度
We need to replenish our stocks of coal. 我们需要再次补充煤的储备。